<template>

  <el-container class="home-container">
    <!--头部区域-->
    <el-header>
      <div>
        <img src="" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--页面主体区域-->
    <el-container>
      <!--侧边栏-->
      <el-aside :width="isCollapse ? '64px':'200px'">
        <div class="toggle-btn" @click="toggleCollapse">
          |||
        </div>
        <!--侧边栏菜单区域-->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
        :default-active="activePath">
          <!--一级菜单-->
          <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
            <!--一级菜单的模板区域-->
            <template slot="title">
              <!--图标-->
              <i :class="iconsObj[item.id]"></i>
              <!--文本-->
              <span>{{item.authName}}</span>
            </template>
            <!--二级菜单-->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children"
                          :key="subItem.id" @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <!--图标-->
                <i class="el-icon-menu"></i>
                <!--文本-->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>

        </el-menu>
      </el-aside>
      <!--右侧内容主体-->
      <el-main>
        <!--路由占位符-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>

</template>

<script>
  export default {
    data() {
      return {
        //左侧菜单数据
        menuList: [],
        iconsObj: {
          '125': 'iconfont icon-UserService',
          '103': 'iconfont icon-icon_-',
          '101': 'iconfont icon-shang_pin_guan_li',
          '102': 'iconfont icon-danju',
          '145': 'iconfont icon-chart'
        },
        //是否折叠
        isCollapse: false,
        //被激活的连接地址
        activePath:''
      }
    },

    created() {
      this.getMenuList()
      this.activePath=window.sessionStorage.getItem('activePath')
    },
    methods: {
      logout() {
        window.sessionStorage.clear();
        this.$router.push('/login');
      },
      //获取所有的菜单
      async getMenuList() {
        const {data: res} = await this.$http.get('menus');
        if (res.meta.status != 200) return this.$message.error(res.meta.msg)
        this.menuList = res.data
        console.log(res);
      },
      //折叠菜单栏
      toggleCollapse() {
        this.isCollapse = !this.isCollapse
      },
      //保存连接的激活状态
      saveNavState(activePath){
        window.sessionStorage.setItem('activePath',activePath)
        this.activePath = activePath

      }
    }
  }
</script>

<style lang="less" scoped>
  .home-container {
    height: 100%;
  }

  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;

    > div {
      display: flex;
      align-items: center;

      span {
        margin-left: 15px;
      }
    }
  }

  .el-aside {
    background-color: #333744;

    .el-menu {
      border-right: none;
    }
  }

  .el-main {
    background-color: #eaedf1;
  }

  .iconfont {
    margin-right: 10px;
  }

  .toggle-btn {
    background-color: #4A5064;
    font-size: 10px;
    line-height: 25px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
